Thermo Products omd-70 service manual Cottage Base Model: OMCCOT-BASE

Page 15

2. Cottage Base Model: OMCCOT-BASE

All installations and services must be performed by qualified service personnel.

If the combustion air passageway cannot terminate outside of the skirting or enclosure, a permanent opening with a minimum of 50 square inches of unobstructed infiltration (free area) for ventilation air must be provided for adequate combustion. This permanent opening must be located no less than 12 inches from the bottom of the enclosure or skirting.

Figure 3.

Slit the corners of connector duct down to the top of the base assembly. If metal projects more than 1-inch above the top of the base assembly, trim the flanges down to 1-inch. While the top of distribution duct is being pulled up with one hand, bend down each side of the connector duct tightly to the base assembly with the other hand. This assures a tight connection between the base assembly and the connector duct and that the distribution duct will be full size. Use high temperature tape and/or high temperature silicone caulking on all joints and seams to minimize air leakage. Secure the base assembly to the floor with two screws in the front flange.

2. Cottage Base Model: OMCCOT-BASE

The OMCCOT-BASE cottage base (Figure 1B) is required for a freestanding cottage base installation. The cottage base is designed to permit the installation of an 8-inch x 12-inch register in each of the two side panels and the rear panel. This allows combustion air to be drawn from outside, or inside, the structure whichever is appropriate, or permissible. See section G. COMBUSTION AIR for further details regarding combustion air requirements.

14

Image 15

Contents DOWN FLOW & DIRECT VENT SEALED COMBUSTION MODEL: OMD-70 INSTALLATION AND SERVICE MANUALFOR YOUR SAFETY GAS-FIREDOR OIL-FIREDFURNACEI. SAFETY SECTION If you do not follow these instructions exactly, a fire or explosion may result causing personal injury, loss of life or property damage Do not attempt to start the burner when All installations and services must be performed by qualified service personnel POWER SWITCH TABLE OF CONTENTS SECTIONBEGINNING PAGE a. Combustible material MODELS OMD/GMD b.Non-combustiblematerialIII. FURNACE SPECIFICATIONS MODELGMD-85 BLOWER DATA BURNER DATAIV. INSTALLATION A. ROOF JACK B. STANDARD CHIMNEYC.FURNACE LOCATION Figure 1A D. BASE INSTALLATIONCombustible Floor Base Model: 70-BASE Cottage Base Model: 01COT-BASE1. Combustible Floor Base Model: 70-BASE 2. Cottage Base Model: OMCCOT-BASE IMPORTANT: Adequate combustion air must be provided under all circumstances. If the underside of the home is skirted or enclosed e.g. by an enclosed crawlspace, the combustion air intake should exit through the side of cottage base and terminate outside of the structure. All joints and seams of supply ducts and combustion air ducts must be closed with a sealing method suitable to the application conditions and temperatures e.g. using high temperature silicone caulk and/or aluminum tape F. CLOSET INSTALLATION E. ALCOVE INSTALLATIONG. COMBUSTION AIR The preferred location of the outside combustion air intake termination e.g. an optional stainless steel intake hood, part no.370183 is through the side of the structure, skirting or enclosure. An alternate termination location is under the structure in the skirted or crawlspace area providing a minimum of 50 square inches of free area exists around the perimeter for outside combustion air to be drawn through. NOTE: Combustion air cannot be drawn from the occupied space of the home Figure H. FUEL PIPING 2. Oil Tank and Piping OMD-70 All installations and services must be performed by qualified service personnel Figure J. ELECTRICAL WIRING 1.Electrical Branch Supply Circuit TERMINAL DEFINITIONS & FIELD WIRING 4. BLOWER CONTROLLER INFORMATION FOR PSC MOTORB. Outputs A. InputsC. Operating Modes DIAGNOSTIC FEATURES PSC TROUBLE SHOOTING5. WIRING DIAGRAM K. BURNER INSTALLATION L.BURNER OPERATION AND ADJUSTMENT replacement parts for location identification. After the furnace is warmed up to a steady- state condition about 15 minutes, the final burner adjustment should be made using combustion instrumentation for measuring carbon dioxide CO2 or oxygen O2, carbon monoxide CO, smoke for oil furnaces, and stack temperature. In order to achieve the most efficient combustion possible, the following steps must be taken BURNER COMBUSTION PARAMETERS M. FLUE GAS COMBUSTION ANALYSISA. TROUBLESHOOTING V. DEALER MAINTENANCENote: Check diagnostic code through view port OMD/GMD TROUBLESHOOTING FLOWCHARTprior to removing doors Are the thermostat wires closed? If 120 VAC is After fuel valve opens, does the burner ignite? Has the high limit thermostat C.HEAT EXCHANGER CLEANING INSTRUCTIONS B.CAD CELL CHECKOUT PROCEDURE: OMD ONLYD. CLEANING OR REPLACING FLUE PIPES E. EXTENDED SHUTDOWN A. WARNINGS AND CAUTIONS VI. USER INFORMATION SECTIONFigure C. INSPECTION AREAS B. COMPONENT LOCATIONSD.FILTER LOCATION AND CLEANING INSTALLATION / SERVICEE. CONTACT INFORMATION APPENDIX A. REPLACEMENT PARTS LIST